From another thread, it sounds like +10 prowess is roughly +1d from vanilla. I got a couple scrolls of enchant weapon and they seem to have increased my weapon's prowess by a grand total of 2 (seems like it should have been 20).

The text on the scroll also still refers to increasing weapon's ToDam.

By the way, please let me know if there is a different/better place to log bugs as I play, rather than spamming the forum.

The scrolls now give a random boost of 1d10 (judging from my reading of the code), so yes, they've been weakened to the point of being largely pointless.

Or weakened to the point of not being a ludicrous exploit, if you look at it the other way ;-)

One of the main aims of v4 is to make it harder than V, which includes making it harder to beef up your weapon.

Thanks for the catch about the scroll description though - yes this is the right place to report bugs.

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"3.4 is much better than 3.1, 3.2 or 3.3. It still is easier than 3.0.9, but it is more convenient to play without being ridiculously easy, so it is my new favorite of the versions." - Timo Pietila